Incrementing VERSION to 84.0.4144.2

TBR=govind@chromium.org

Change-Id: I883d98d13ce8fa3c3fe65013eb47be13d0b0698a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2196857
Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/branch-heads/4144@{#4}
Cr-Branched-From: 3acaa1f-refs/heads/master@{#767520}

chrome/VERSION

@@ -1,4 +1,4 @@
 MAJOR=84
 MINOR=0
 BUILD=4144
-PATCH=1
+PATCH=2